Coutu, the suit says, was crossing 34th St. at Third Ave. - near his home - on March 29 when Santo Domingo's luxe ride rolled over the college student's foot and slammed his arm with a rear-view mirror.

Santo Domingo "intentionally left the scene of the accident," the suit says, but not before Coutu got the license plate on his Mercedes-Benz.

"This is a rich, spoiled guy," Subin said. "He just left [Coutu] there."

Santo Domingo could not be reached at his Brooklyn recording company or his Flatiron digs, and calls and emails to his wife at Vogue and her online fashion retailer were not returned.

Subin insisted Coutu initially had no intention of tangling with one of Colombia's wealthiest families, whose members have become a fixture of the New York society set.

"He didn't want a lawsuit, he didn't want attention, he didn't want to do anything," Subin said. "But as his injuries got worse, he didn't have a choice."

Santo Domingo, 31, is a son of brewing big Julio Mario Santo Domingo, whose fortune last year was pegged at $6 billion by Forbes - earning him spot No. 123 on the mag's list of the world's billionaires.